Stratified Random Sampling Is a Method of Selecting a Sample

question 40

Multiple Choice

Stratified random sampling is a method of selecting a sample in which

• A) the sample is first divided into strata, and then random samples are taken from each stratum.
• B) various strata are selected from the sample.
• C) the population is first divided into strata, and then random samples are drawn from each stratum.
• D) the population is first divided into various stratums and then random samples are drawn from each strata.

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Definitions:

Cumulative Binomial Probabilities

The sum of probabilities of achieving a given number of successes in a fixed number of Bernoulli trials.

Relative Frequency

The ratio of the number of times a specific value or event occurs to the total number of occurrences in a given dataset.

Population

The entire group of individuals or instances about whom the research is concerned.

Expected Value

The weighted average of all possible values a random variable can take on, with the weights being the probabilities of each outcome.